Why Is This Rochester Clock Stopped at 5:50?

I was out trying to get my 10,000 steps in the other day when walked past this stopped clock in a downtown Rochester park. But does that time have any meaning?

In case you hadn't already guessed, the park I walked by was Central Park, along 1st Avenue Northwest and 2nd Street Northwest. It is, as the decorative plaque told me, the site of Rochester's first park.

The land, the plaque notes, was donated by William Dundas Lowry, back in 1856. But that's about all it says. What I'm curious about, though, is the Central Park clock. It faces 1st Avenue at 2nd Street.

When I walked by the clock around 12:45 or so, it was stopped dead at 5:50. And so, I'm left wondering, why?

Is there some historical significance to that time? Is it perhaps the exact time the first picnic was held in Rochester's first park back in 1856?

Or does it hold some meaning in the long, storied history of Mayo Clinic? Is it perhaps when Dr. William Worrall Mayo and the sisters of Saint Marys first treated patients after the big tornado?

I don't know. I'm guessing, though, that those are merely examples of my imagination working overtime. It could be that 5:50 is just the time the clock just stopped working, right?

Or is it?